package com.da.boot.config;

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.da.boot.bean.Pet;
import com.da.boot.converter.JokerMessageConverter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.format.FormatterRegistry;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.util.StringUtils;
import org.springframework.core.convert.converter.Converter;
import org.springframework.web.accept.HeaderContentNegotiationStrategy;
import org.springframework.web.accept.ParameterContentNegotiationStrategy;
import org.springframework.web.filter.HiddenHttpMethodFilter;
import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
import org.springframework.web.servlet.config.annotation.PathMatchConfigurer;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.util.UrlPathHelper;

/**
 * @author JokerDa.
 * @date 2021/1/21 11:02
 * Description:
 */
@Configuration
public class WebConfig /*implements WebMvcConfigurer*/ {
    @Bean
    public HiddenHttpMethodFilter hiddenHttpMethodFilter() {
        HiddenHttpMethodFilter hiddenHttpMethodFilter = new HiddenHttpMethodFilter();
        hiddenHttpMethodFilter.setMethodParam("_m");
        return hiddenHttpMethodFilter;
    }

    @Bean
    public WebMvcConfigurer webMvcConfigurer() {
        return new WebMvcConfigurer() {
            /**
             * 自定义内容协商策略
             * @param configurer
             */
            @Override
            public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
                //Map<String, MediaType> mediaTypes
                Map<String, MediaType> mediaTypes = new HashMap<>();
                mediaTypes.put("json", MediaType.APPLICATION_JSON);
                mediaTypes.put("xml", MediaType.APPLICATION_XML);
                mediaTypes.put("da", MediaType.parseMediaType("application/x-joker"));
                //指定支持解析哪些参数对应的哪些媒体类型
                ParameterContentNegotiationStrategy parameterStrategy = new ParameterContentNegotiationStrategy(mediaTypes);
                //改变策略的名字，默认是format
                //parameterStrategy.setParameterName("ff");
                HeaderContentNegotiationStrategy headerStrategy = new HeaderContentNegotiationStrategy();
                configurer.strategies(Arrays.asList(parameterStrategy, headerStrategy));
            }

            @Override
            public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
                converters.add(new JokerMessageConverter());
            }

            @Override
            public void configurePathMatch(PathMatchConfigurer configurer) {
                UrlPathHelper urlPathHelper = new UrlPathHelper();
                // 不移除；后面的内容。矩阵变量功能就可以生效
                urlPathHelper.setRemoveSemicolonContent(false);
                configurer.setUrlPathHelper(urlPathHelper);
            }

            @Override
            public void addFormatters(FormatterRegistry registry) {
                // 这里如果使用lambda表达式会报错
                registry.addConverter(new Converter<String, Pet>() {
                    @Override
                    public Pet convert(String source) {
                        // 啊猫,3
                        if (!StringUtils.isEmpty(source)) {
                            Pet pet = new Pet();
                            String[] split = source.split(",");
                            pet.setName(split[0]);
                            pet.setAge(Integer.parseInt(split[1]));
                            return pet;
                        }
                        return null;
                    }
                });
            }
        };
    }

    //@Override
    //public void configurePathMatch(PathMatchConfigurer configurer) {
    //    UrlPathHelper urlPathHelper = new UrlPathHelper();
    //    // 不移除；后面的内容。矩阵变量功能就可以生效
    //    urlPathHelper.setRemoveSemicolonContent(false);
    //    configurer.setUrlPathHelper(urlPathHelper);
    //}
}
